Changed it today. pig of a job, managed to cover my head in oil while filling.

Also found magnetic plug in filler rather than drain.

Welcome to the wonderful world of home servicing.

That filler is a pig to get at, being nicely obscured by the handbrake cable.

I got a Draper oil filler syringe thingy that helps a lot - about the size of a grease gun. But it is still a fiddle to get the feed pipe into the filler hole and the syringe is not quite leak-proof.